apt-get install build-essential pkg-config autoconf bison re2c libxml2-dev libssl-dev libsqlite3-dev libcurl4-openssl-dev libpng-dev libjpeg-dev libonig-dev libfreetype6-dev libxslt1-dev libzip-dev libtidy-dev libmysqlclient-dev
cd /usr/local/src
VERSION=7.4.21
wget -qO- https://www.php.net/distributions/php-${VERSION}.tar.gz | tar -xz
cd php-${VERSION}/ext
git clone --depth 1 --branch v1.1.4 https://github.com/krakjoe/parallel.git
cd ..
./buildconf --force
./configure \
--prefix=/etc/php/7.4z \
--with-config-file-path=/etc/php/7.4z \
--with-config-file-scan-dir=/etc/php/7.4z/conf.d \
--disable-cgi \
--with-zlib \
--with-zip \
--enable-soap \
--enable-intl \
--with-openssl \
--with-curl \
--enable-mysqlnd \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--enable-pcntl \
--enable-gd \
--enable-exif \
--with-jpeg \
--with-freetype \
--with-xsl \
--with-gettext \
--enable-bcmath \
--enable-mbstring \
--enable-calendar \
--with-tidy \
--enable-maintainer-zts \
--enable-parallel \
--enable-ftp \
--enable-sockets
make -j$(nproc)
make install
cp php.ini-production /etc/php/7.4z/php.ini
ln -s /etc/php/7.4z/bin/php /usr/bin/php74z
Additional config: OPCache needs to be turned on, otherwise may run to memory corruption error in parallel extension.
mkdir /etc/php/7.4z/conf.d nano /etc/php/7.4z/conf.d/additional.ini
memory_limit=-1 [opcache] zend_extension=opcache opcache.enable=1 opcache.enable_cli=1 opcache.memory_consumption=512 opcache.interned_strings_buffer=128 extension=amqp.so pdo_mysql.default_socket="/var/run/mysqld/mysqld.sock"